[WIP] Find a fix for PostgreSQL sequences after PUT forcing record id

cliquet/storage/postgresql/__init__.py

@@ -218,10 +218,19 @@ def update(self, resource, user_id, record_id, record):
             # Create or update ?
             query = "SELECT id FROM records WHERE id = %s;"
             cursor.execute(query, (record_id,))
-            query = query_update if cursor.rowcount > 0 else query_create
+            if cursor.rowcount > 0:
+                cursor.execute(query_update, placeholders)
+                result = cursor.fetchone()
+            else:
+                cursor.execute(query_create, placeholders)
+                result = cursor.fetchone()
 
-            cursor.execute(query, placeholders)
-            result = cursor.fetchone()
+                cursor.execute('SELECT MAX(id) AS max FROM records;')
+                max_id = cursor.fetchone()['max']
+                bump_serial = """
+                ALTER SEQUENCE records_id_seq RESTART WITH %s;"
+                """
+                cursor.execute(bump_serial, (max_id,))
 
         record = record.copy()
         record[resource.id_field] = record_id

cliquet/storage/postgresql/schema.sql

@@ -26,8 +26,9 @@ CREATE CAST (TIMESTAMP AS BIGINT)
 --
 -- Actual records
 --
+CREATE SEQUENCE records_id_seq NO MAXVALUE NO CYCLE;
 CREATE TABLE IF NOT EXISTS records (
-    id SERIAL PRIMARY KEY,
+    id INTEGER DEFAULT nextval('records_id_seq') PRIMARY KEY NOT NULL,
     user_id VARCHAR(256) NOT NULL,
     resource_name  VARCHAR(256) NOT NULL,
     last_modified TIMESTAMP NOT NULL,